Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:43:58 2013

Optimize a model with 40383 rows, 39753 columns and 158823 nonzeros
Presolve removed 4010 rows and 0 columns
Presolve time: 0.23s
Presolved: 36373 rows, 39753 columns, 150803 nonzeros
Variable types: 39690 continuous, 63 integer (63 binary)

Root relaxation: objective 6.438237e+04, 6972 iterations, 0.95 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0 64382.3740    0    3          - 64382.3740     -      -    1s
H    0     0                    64667.000000 64382.3740  0.44%     -    1s
     0     0 64382.6126    0    4 64667.0000 64382.6126  0.44%     -    1s
     0     0 64385.1061    0    4 64667.0000 64385.1061  0.44%     -    2s
     0     0 64385.5749    0    4 64667.0000 64385.5749  0.44%     -    2s
     0     0 64385.5887    0    3 64667.0000 64385.5887  0.44%     -    2s
     0     0 64385.5887    0    2 64667.0000 64385.5887  0.44%     -    3s
     0     0 64385.7456    0    3 64667.0000 64385.7456  0.43%     -    3s
     0     0 64385.7456    0    3 64667.0000 64385.7456  0.43%     -    3s
     0     0 64385.7456    0    3 64667.0000 64385.7456  0.43%     -    4s
     0     2 64390.7109    0    3 64667.0000 64390.7109  0.43%     -    4s
H    4     2                    64625.621224 64447.3852  0.28%  87.5    4s
H    5     2                    64604.250000 64447.3852  0.24%  78.6    4s
*    8     4               7    64513.000000 64447.3852  0.10%  58.4    4s

Cutting planes:
  Gomory: 1
  Flow cover: 3

Explored 12 nodes (10093 simplex iterations) in 4.83 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.451300000000e+04, best bound 6.451300000000e+04, gap 0.0%